2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * Copyright (C) 2001 - 2013 Tensilica Inc.
9 #ifndef _XTENSA_TIMEX_H
10 #define _XTENSA_TIMEX_H
12 #include <asm/processor.h>
13 #include <linux/stringify.h>
15 #if XCHAL_NUM_TIMERS > 0 && \
16 XTENSA_INT_LEVEL(XCHAL_TIMER0_INTERRUPT) <= XCHAL_EXCM_LEVEL
17 # define LINUX_TIMER 0
18 # define LINUX_TIMER_INT XCHAL_TIMER0_INTERRUPT
19 #elif XCHAL_NUM_TIMERS > 1 && \
20 XTENSA_INT_LEVEL(XCHAL_TIMER1_INTERRUPT) <= XCHAL_EXCM_LEVEL
21 # define LINUX_TIMER 1
22 # define LINUX_TIMER_INT XCHAL_TIMER1_INTERRUPT
23 #elif XCHAL_NUM_TIMERS > 2 && \
24 XTENSA_INT_LEVEL(XCHAL_TIMER2_INTERRUPT) <= XCHAL_EXCM_LEVEL
25 # define LINUX_TIMER 2
26 # define LINUX_TIMER_INT XCHAL_TIMER2_INTERRUPT
28 # error "Bad timer number for Linux configurations!"
31 extern unsigned long ccount_freq;
33 void local_timer_setup(unsigned cpu);
39 #define WSR_CCOUNT(r) asm volatile ("wsr %0, ccount" :: "a" (r))
40 #define RSR_CCOUNT(r) asm volatile ("rsr %0, ccount" : "=a" (r))
41 #define WSR_CCOMPARE(x,r) asm volatile ("wsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) :: "a"(r))
42 #define RSR_CCOMPARE(x,r) asm volatile ("rsr %0,"__stringify(SREG_CCOMPARE)"+"__stringify(x) : "=a"(r))
44 static inline unsigned long get_ccount (void)
51 static inline void set_ccount (unsigned long ccount)
56 static inline unsigned long get_linux_timer (void)
59 RSR_CCOMPARE(LINUX_TIMER, ccompare);
63 static inline void set_linux_timer (unsigned long ccompare)
65 WSR_CCOMPARE(LINUX_TIMER, ccompare);
68 #include <asm-generic/timex.h>
70 #endif /* _XTENSA_TIMEX_H */